<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=<device-width>, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">

    </div>
</body>
<script src="https://unpkg.com/vue@next"></script>
<script>
    const app =Vue.createApp({
        data(){
            return{
                item:'aaa'
            }
        },
        template:`
        <layout-demo v-slot="props">
        <div>{{props}}</div>
        </layout-demo>
        <layout-demo v-slot={item}>
        <div>{{item}}</div>
        </layout-demo>
        `
    })
    app.component('layout-demo',{
        data(){
            return{
                lists1:[1,2,3],
                lists:[
                    {title:'A'}, {title:'B'}, {title:'C'},
                ]
            }
        },
        template:`
        <div>
        <slot v-for="item in lists" :item="item"></slot>
        </div>
        `

    })
    const vm = app.mount("#app");
</script>
</html>